Blue moon in Gaza City

(
Mohammed Abed / AFP/Getty Images
/
August 31, 2012
)

A full moon is seen from Gaza City on Aug. 31, 2012. According to NASA, this is the second time in this month that a full moon is seen -- the first was Aug. 1 to 2. This phenomenon, which is referred to as the blue moon, happens every two and a half years on average.